#include "sys.h"
#include "delay.h"
extern u16 ch;
void adc_init()
{
	GPIO_InitTypeDef GPIO_InitStructure;
	ADC_InitTypeDef ADC_InitStructure;
	
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_ADC1,ENABLE);
	
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
	GPIO_Init(GPIOA,&GPIO_InitStructure);
	
	RCC_ADCCLKConfig(RCC_PCLK2_Div6);
	ADC_DeInit(ADC1);
	
	ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
	ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
	ADC_InitStructure.ADC_ScanConvMode = DISABLE;
	ADC_InitStructure.ADC_NbrOfChannel = 1;
	ADC_Init(ADC1,&ADC_InitStructure);
	
	ADC_Cmd(ADC1,ENABLE);
	
	ADC_ResetCalibration(ADC1);
	while(ADC_GetResetCalibrationStatus(ADC1));
	ADC_StartCalibration(ADC1);
	while(ADC_GetCalibrationStatus(ADC1));
	
}

u16 adc_get(u8 ch)
{
	ADC_RegularChannelConfig(ADC1,ch,1,ADC_SampleTime_239Cycles5);
	ADC_SoftwareStartConvCmd(ADC1,ENABLE);
	while(ADC_GetSoftwareStartConvStatus(ADC1));
	return ADC_GetConversionValue(ADC1);
}

u16 adc_get_averge(u8 ch,u8 times)
{
	u16 t,i;
	for(i=0;i<times;i++)
	{
		t+=adc_get(ch);
		delay_ms(5);
	}
	return t/times;
}

